Are you requesting automatic instrumentation for a framework or library? Please describe.

• Framework or library name : Elasticsearch.Net
• Library type: .net core
• Library version: 3.1

Is your feature request related to a problem? Please describe.
After upgrading from Elastic 6 to Elastic 7 we lost our auto instrumentation for elasticsearch.

Describe the solution you'd like
Add auto instrumentation for Elasticsearch.Net v7.